Add Yahoo as a preferred source to see more of our stories on Google. The new series is designed to help kids ages 4-8 learn core science concepts through videos, game-play and hands-on activities.

Ruff’s first “ARF” assignment reveals how cutting holes in a tower may be a solid idea. Kids call in to Ruff’s new service, called “Ask Ruff First” or “ARF,” looking for a way to keep their mini-golf ...